Stay-bolt.



I. FOTHERINGILL.

STAY BQLT.

APPLICATION HLED MAR. 2l, 1917.

l 44,308., Patented Get. 23, 1917.

. Lai-fases.

Application led March 21, 1917. Serial No. 156.3734.

:To all/whom it may concern.'

Be it known that l, `JOHN FoTnnnINGiLL,

a. citizen of the United States, residing aty Fort Scott, in the `county' of Bourbon yand State of Kansashave invented certain new andV useful Improvements in Stay-Bolts and l do hereby declare the following Vto tbe a full, clear, and exact description of the invention, such as will enable'othe'rs skilled in the art to which it appertains to make and use the same. f

This invention relates to `new and useful improvements in stay bolts and the principal object of the invention is to provide a flexible stay bolt for boilers and the like which will allow the `inner boiler sheet to move relatively to the outer boiler sheet.

lVith these and other objects in view, the invention consists in the novel combination and arrangement of parts which will be fully set forth in the following specification and accompanying drawings, in which Figure 1 is a fragmentary sectional View through a pair of boiler sheets showing the socket secured in the outer sheet with the bolt threaded into the inner sheet and illustrating the squared end on the bolt by which it is turned;

Fig. 2 is a view similar' to Fig. 1 showing the socket in section and illustrating the squared end of the bolt cut oftl and flanged to form a head to prevent accidental movement of the bolt;

Fig. 3 is a horizontal sectional View on line 3-3 of Fig. 2; and

Fig. Il is an end view of the socket showing the cap and wedge in place.

Referring to the drawings, the numeral 1 designates the outer boiler sheet provided with a suitable opening 2 for the reception of the socket which will be more fully hereinafter described. The inner boiler sheet is illustrated by the numeral 3 and provided with a threaded opening 4 which is of less diameter than the opening 2 and arranged in axial alinement therewith. Secured in the opening 2 is the socket designated by the numeral 5 which is formed with a reduced neck 6 which projects through the opening 2 and has its inner end flanged as at 7 to provide a securing means which coperates with the socket 5 in holding the same in place. The socket is formed in its outer end on one side with a relatively large slot 8 and at a point diametrically opposite the same with a relatively smaller slot 9 into Specification of Letters Patent. l

Patented oet. as, 1er?.

which the wedge which willQbe more fully hereinafter described extends. An annular shoulder' 10 is formed ony the interior rof the Socket 5 and forms a seat against which the cap which will be more fully' hereinafter described, bears. f.

ntroduced through the outer end of the socket'is the bolt designated generically by the numeral 11 which comprises a kshank 12 formed with a head 13 and provided at the end opposite the: head with threads 14C. The head is received within the socket as clearly illustrated in Fig. 2, and the end of the shank 12 opposite that point with the head is provided with a reduced rectangular portion 15 which provides a means by which the bolt may be turned. The bolt is introduced as previously described through the enlarged opening in the ysocket and extends through the neck section and into the threaded openingk 4. The same is tightened by the application of a wrench to the squared portion 15 and it will be seen that it may be adjusted to meet various requirements. After the bolt has been properly tightened in place the squared portion is out oft' and the end of the bolt upset as at `16 to form a head which will prevent the bolt from becoming loosened.

In order to close the end of the socket through which the bolt is introduced, a cap 17 vis provided which consists of a disk adapted to it against the shoulder 10 which disk is formed with an inner concaved face 18 for the reception of the bolt head as clearly illustrated in Figs. 2 and 3. The outer side of the disk is kprovided with a transverse groove 19 for the reception of the tapered pin 20 which is driven through the openings 8 and 9 and provided at its reduced end with screw threads on which the nut 21 is threaded in order to firmly lock the pin in place.

It will be apparent from the foregoing that the device is assembled in the manner illustrated in Figs. 2 and '3, by passing the bolt through the socket and into the threaded opening 4L and after the bolt is tightened to the proper degree the end thereof is upset in order to firmly lock the same in place. After the proper adjustment has been made, the cap 17 is fitted in place against the shoulder 10 and the wedge pin 20 is then driven through the openings 8 and 9 so as to firmly force the cap against the shoulder to form a fluid tight joint. In this way it will be seen that any possibility of the escape of steam from the'boiler through the socket is eliminated and yet the inner sheet 3 is free to move Without moving the sheet l, thus insuring flexibility of the device.

'Vhile in the foregoing there has Vbeen shown and described the preferred embodiment of this invention, it is to be understood that such changes matT be made in the con1- bination and arrangement of parts as Will fall Within the spirit and scope of the appended claim.

A sta-y bolt comprising the combination With inner and outer boiler sheets having aline-d apertures therein, of a socket extend- Ying through one of the apertures and being secured to the sheet, a bolt extended through the socket and secured in the opposite boiler Copies of this patent may be obtained for sheet, the head of the bolt being seated in the socket, an annular shoulder Within the socket, and a capV for engagement against the annular shoulder to form a steamtight joint, said cap being spaced a short distance from the bolt heard to allo7 for play of the bolt head Within the socket, the socket being provided With a pair of alined apertures and a Wedge fitted in said apertures and bearing against the cap to force the cap against the shoulder, and means securing the Wedge in place.

In testimony whereof I affix Ymy signature in presence of two witnesses. y

JOHN l?GTHERDYGPILL.` 'Vitnesses:

W. DARLNG, C. H. CAsNnR.

ve cents each, by addressing the Commissioner offatents Washington, D. C. e 

